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A. J.v 8v F. L. KELCHNER. BORING MACHINE.

Patented May 30, 1893.

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grecs, as shown in Fig. l.

UNITED STATES PATENT OFFICE.

ALVIN J. KELCHNER AND FRANK L. KELOI-INER, OF MILWAUKEE, WIS- OONSIN, ASSIGNORS TO THE JOHN SCHROEDER LUMBER COMPANY,

OF SAME PLACE.

scemo-MACHINE.

SPECIFICATION forming part of Letters Patent No. 498,555, dated May 30, 1893.

Application filed August l, 1892. Serial No. 441,826. (No model.)

To a/ZZ whom it may concern:

Be it known that we, ALVIN J. KELCHNER and FRANK L. KELCHNER, citizens of the United States, and residents of Milwaukee, in the county of Milwaukee, and in the State of Wisconsin, have invented certain new and useful Improvements in Boring-Machines; and we do hereby declare that the following is a full, clear, and exact description thereof.

Our invention has for its object to provide a simple economical machine especially designed for boring nail-holes in hard wood flooring at predetermined intervals; and it consists in certain peculiarities of construction and combination of parts hereinafter described with reference to the accompanying drawings and subsequently claimed.

In the drawings: Figure 1, represents the essential elements of our machine partly in end elevation and partly in vertical transverse section on line l--l of the succeeding gure; Fig. 2, a side elevation of the parts shown in the preceding figure; Fig. 3, a vertical longitudinal section on line 3 3 of Fig. l; Fig. 4,a detail plan view partlyin horizontal section on line 4 4 of the preceding figure; Fig. 5, a detail section on line 5-5 of Fig. l; Fig. 6, an under side plan view of a piece of hard wood flooring worked on our machine when provided with a feed-wheel having printing characters on its face, and Fig. 7, a detail elevation of said feed-wheel.

Referring by letter to the drawings A A represent a pair of parallel longitudinal timbers forming part of the table portion of our machine, and supported on these timbers is a pair of parallel transverse beams B B to which a casting O is bolted or otherwise rigidly secured. The casting has its length in the same direction as that of said timbers, and the sides of thisV casting converge toward each other in an upward direction, the angles of convergence being preferably forty-five de- At its apex, the casting is provided with parallel vertical guides D D either cast therewith or bolted thereto, as may be found most convenient or desirable in manufacture, these guides beingstrengthened by braces E preferably integral with themselves and said casting. p

Arranged to work on the guides is a cross-- head F provided with lateral bearings b that extend out over the inclined sides of the casting C, and loosely arranged in these bearings are spindles G that have pulleys H fast thereon and carry boring-tools I at their lower ends. By means of belts J,the pulleys H are connected to a driving mechanism and thus a rotation is imparted to said tools.

A pitman K is pivoted between a pair of vears c depending from the cross-head F, and

the lower end of this pitman is wristed to a disk L fast on the inner end of a shaft M that rotates in bearings d depending from the timbers A of the machine table, the connection between said pitman and disk being eccentric 4 engages a ratchet-wheel S fast on another y shaft T that hasjts bearin gs fon the table-timbers, and intermediate of these timbers feed- `wheels U U are alsok fast on the latter shaft. The feed-wheels engage longitudinal slots g in the inclined sides ofthe casting C, hereinbefore described, and have serrated faces that correspond to the angle of the same..

In practice it will be found preferable to have certain of the feed-wheelsserrations in the form of characters representing the name of the party or irm employing the machine whereby the name will be indented in the flooring, as it passes through said machine, or instead of said name or in addition thereto, other words or marks may he employed to identify the product, this feature of our invention beingclearly illustrated in Figs. 6 and 7.

A longitudinal gage V provided with slotted right-angle ears h is adjustably held on each inclined face of the casting C, adjacent to the lower edge of the same, by means ofsetscrews z' engaging the ear slots and suitable openings in said casting.

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Fast on each inclined face of the casting C adjacent to the gage V, but below the same, are yoke shaped guides W for sliding boxesj limited as to downward movement by any suitable means, such for instance as pins k projecting from said casting, and by means of screws m adjustable in the upper end of the guides, the boxes may be controlled as to upward movement.

In line with the guides and boxes, just described, are similar devices, the latter boxes being limited in their travel by pins and screws similar to those previously specified. The latterguides are held in place on the casting C by means of set-screws n engaging this casting and slotted ears extended at right angies from gages X in opposition to the gage V hereinbefore described, this lattergage being recessed at intervals of its length to give clearance for pressure-rollers Y journaled in the boxes that work in the opposing guides above specified, the loose play of these boxes being proportionate to the thickness of the material worked on the machine, while the set of the gages is proportionate to standard width of said material.

In practice the boring tools I are given a continuous rotation and the reciprocation of the cross-head F, due to the pitman and eccentric connection thereof with the shaft M, causes said tools to come in and out of operation against strips Z of hard wood flooring fed along between the gages on the inclined faces of the casting C by frictional contact with the wheels U and rollers Y, this feed beingintermittent and occurring when said tools are out of engagement with the flooring-strips. The intermittent action of the feed-mechan ism is due to the pawl and ratchet controlled by the lever Q that is actuated by the crank O on the shaft M, the throw of this lever, and consequent feed of the flooring strips, being determined by the adjustable connection between said lever and crank, whereby the intervals between holes in said flooring-strips may be varied at the will of the operator. The boring is done only on the tongue-edges of the ooring strips, as shown in Fig. l, and the indenting of the under sides of said strips is due to their pressure on the feed-wheels. The flooring strips may be fed to one or both sides of the machine, organized as herein described, and it is obvious that one inclined side of the casting C, together with the corresponding boring and feed-mechanism may be omitted to cheapen the manufacture of a machine for the purpose set forth. This latter form of machine however will only have one half the capacity of the one herein shown.

Having now fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

l. The combination of a vertically reciprocating boring-tool, an inclined support opposed to the tool, a gage on the support longitudinal of the same, guides arranged in pairs on said support,boxes adjustable in the guides, pressure-rollers journaled in the boxes, and an intermittently actuated feed-wheel extending through the aforesaid support from beneath the same, substantially as set forth.

2. The combination of a vertically reciprocating boring-tool, an inclined support opposed to the tool, a gage having a transverse adj nstment on the support, guides arranged in pairs on said support, boxes in the guides, pressure-rollers journaled in the boxes, and an intermittently actuated feed-wheel extending through the aforesaid support from beneath the same, substantially as set forth.

3. The combination of a pair of vertically reciprocating boring-tools, a support in the form of a casting having sides converging toward each other in an upwarddirection and each of these sides opposed to one of the boring-tools', pressure-rollers and gages arranged on the inclined sides of thevsupport, and 1ntermittently actuated feed-wheels extending through said sides of the support from beneath the latter, substantially as set forth.

4. The combination of an inclined support having vertical guides extended upward therefrom, other guides arranged in pairs to extend outward from the face of the support, boxes in the latter guides, pressure-rollers journaled in the boxes transverse of said support, a gage also arranged on the face of the aforesaid support longitudinally of the same, a cross-head arranged to work in the vertical guides` a boring-tool connected to the crosshead, a drive-shaft having an eccentric-andpitman connection with the cross-head, a counter-shaft, a feed-wheel that is fast on the counter-shaft and extends through the inclined support, a ratchet-wheelalso fast on said counter-shaft, a lever carrying a pawl in engagement with the ratchet-wheel, and a crank connecting the lever and drive-shaft, substantially as set forth.

5. The combination of a vertically reciprocative boring-tool, an inclined support opposed to the tool, a gage having a transverse adjustment on the support guides arranged in pairs on the support, boxes in the guides, pressure-rollers journaled in the boxes, and an intermittently actuated feed-wheel that extends through the aforesaid support and has peripheral serrations in the form of arbitrarily selected characters, substantially as set forth.

In testimony that we claim the foregoing we have hereunto set our hands, at Milwaukee, in the county of Milwaukee and State of Wiscousin, in the presence of two witnesses.

ALVIN J. KELCHNER. F. L. KELCHNER. Witnesses:

N. E. OLIPHANT, H. H. Vltlnrxsntm.

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